DE2802680A1 - CONNECTOR AND METHOD OF MANUFACTURING A CONNECTOR - Google Patents

Description

PATENT LAWYERS

Dipl.-Ing. P. WIRTH ■ Dr. V. SCHMIED-KOWARZIK Dlpl.-lng. G. DANNENBERG ■ Dr. P. WEINHOLD ■ Dr. D. GUDEL

281134 6 FRANKFURT / M.

TELEPHONE (0611) _{287 (J14} GR.ESCHENHEIMER STR.39

Gu / Schu Ref .: 77-5065

January 19, 1978

YAZAKI Corporation No. 1-4-28, Mita, Minato-ku, Tokyo,
Japan 108

Connector and method of manufacturing a connector

809831/0

description

The invention relates to a connector and a method for producing such a connector. the Novel plug connectors are to be used in particular for wiring electrical circuits in motor vehicles * The new connectors should not be annoying Cause more noises that result from their vibration or striking against neighboring components of the vehicle body, ; .- ■■ "· '■

The level of completion of motor vehicles has lately Tent raised significantly. In particular, increasing attention is paid to the convenience of vehicle users. Special Under these circumstances, attention should be paid to the noise caused by vibrations of components of the motor vehicle in the process Operation originates. Components made of plastic, which are widely used in the construction of motor vehicles, come among others as a sound source. Such Plastic parts vibrate against the vehicle body and generate the disturbing sound. Connectors will be usually made of hard plastic material, for example Nylon, polypropylene or acrylonitrile-butadiene-styrene. Such connectors are used in particular for wiring or for wiring equipment in electrical Circuits used in motor vehicles and can be the cause of noise .; This applies in particular to connectors, behind the dashboard in or near the passenger compartment. Interfering noise can also arise if Socket and plug of a connector are only loosely plugged into one another, which also makes them more susceptible to failure Connection is increased.

It is therefore an object of the invention to provide a connector pair propose when using the generation of sound

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is reduced in a vehicle. In addition, the new connector should improve the electrical connection between socket and plug. ₍ .

The object is achieved by a novel connector according to the invention without its size or weight being felt is increased.

To solve this problem, the connector according to the invention is characterized in that at least one part its surface is coated with fibers.

The method of making such a connector is characterized according to the invention in that an ¥ olk of pulverized pieces of fiber, which is free in every direction can move, is blown between two electrodes connected to voltage, whereupon the connector parts between the Electrodes are moved. At least part of the surface of the connector is coated with an adhesive, so that some of the bits of fiber stick to it and <Lort one Form coating. The adhesive layers are then dried on the surfaces to cover the fiber to fix there.

The invention is explained in more detail below with reference to exemplary embodiments, from which further important ones emerge Features result. It shows:

Fig. 1 - a perspective view of a connector pair which is coated with fibers at those points which are exposed when plugged in;

Fig. 2 - in perspective another pair of connectors, which as before with fibers on those parts the surface is coated, which are freely exposed in the mated state of the connector.

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In addition, a coating is provided on an engagement part of the plug in the unmated state; . . . · '

3 shows a schematic of an arrangement for explaining a first, essential process step according to the invention, wherein pulverized fiber particles between two electrodes are blown to which a predetermined voltage is applied such that a cloud is formed from fibers moving freely in either direction;

Fig. 4 - also schematically a second essential one Process step, with on its surface with an adhesive coated connector is moved through the cloud of bits of fiber;

Fig. 5 - a third essential method step, wherein

the fiber-coated connectors dry. be net;

6 - a schematic diagram of the arrangement for a sound measurement test to compare the sound levels in plug connectors according to the invention with conventional connectors;

FIG. 7 is a diagram showing the test results for the arrangement according to FIG. 6; FIG.

8 - another perspective and also schematically Vibration test to compare the sound levels resulting from connectors according to the invention and compared to conventional connectors in the vibration range from 50 Hz to 12,500 Hz;

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9-15 - diagrams with test results of the test series carried out with the arrangement according to FIG. . _. ·

Fig. 1 shows a connector 2, which usually consists of a plug 2a and a socket 2b. Part 4 of the Plug 2a and a part 6 of the socket 2b engage in one another in the plugged-in state. A part 8 of the plug 2a and a part of the socket 2b do not engage in one another when the connector is plugged in. These parts 8 and 10 are coated with fibers 12.

In FIG. 2, part 4 of plug 2 is also coated with fibers 12. But this coating is something thinner than the coating of the "free" part 8 in the plugged-in state. The engaging part 6 of the socket 2b is not coated. It is also preferred to coat the plug and socket with different colored fibers in order to to be able to distinguish them more easily from each other. The coating does not need to be applied to the entire surface Part to be present. Depending on the area of application, the coating can also only cover part of the surface extend. The fibers for the coating can consist of nylon, rayon or wool or cotton. The connector is made from paper, polypropylene, nylon, glass, metal, urethane, rubber foam, and the like.

A preferred method of making such a connector is explained below with reference to FIGS. 3 to 5. In a first process step, pulverized Grasp the bits and pieces that form a people A pair of electrode plates 14 to which a voltage of 40,000 volts is applied, as shown in FIG. 3, is blown. The fibers are made of nylon, rayon or cotton. The fiber length is preferably between 0.3 and 3 mm. The electrode

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plates keep a distance of about 20 to 30 cm from each other. The blown fiber pieces are attracted to the electrode plates because of their dielectric polarization. Will For example, if a few pieces of fiber are attracted to the positively charged electrode plate, they are positively charged above. These pieces of fiber are therefore pushed back by the positive electrode plate into the space and are from attracted to the negatively charged electrode plate. If you touch this negative electrode plate, they become negatively charged and move back into space, whereupon the game repeats itself. The fiber pieces therefore form a cloud moving freely in every direction between the two electrode plates.

In a second step, a connector pair is created 2 consisting of plug and socket in the plugged-in state moved through the cloud of fibers, as shown in FIG. 4 * The plug-in connector can be moved through the cloud of fibers, whether plugged or not, individually or together, see above that the selected part is coated in a predetermined color. These connector parts were previously with an adhesive coated on their outside to be coated. When the connector passes through the cloud of fibers, fibers adhere to the adhesive and therefore form a coating. In this way, the connectors can be selectively coated with fibers. The length of the fiber pieces is preferably between 0.3 and 3 mm, while their thickness is in the range between 1.5 and 30 denier, depending on the mass of connector material and other components of the motor vehicle that use this connector in the Surrounding operation. If the connectors are not plugged in State moved by the cloud, so the adhesive is beforehand given to at least one of the engagement parts 4 or 6. In in most cases, however, the engaging part 4 of the Connector 2a coated with adhesive. This becomes a

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Connector pair made with good soundproofing. In addition, the security of the electrical connector is this Connector increased. Pipes with a length of about 0.3 mm are sufficient for this. The components treated in this way can interlock be plugged in to treat their outer surface additionally. When the connector 2 through the cloud of fibers 12 ' are moved through when plugged in, only the exposed surfaces are provided with adhesive. From this it follows ensure that the fibers are deposited on these exposed surfaces of the connectors 2.

In a third method step, the connectors with fibers on their surface are moved through a high-temperature chamber and heated there, namely for about 10 minutes to a temperature between 80 and 100 ^° C., as FIG. 5 shows. Alternatively, the connectors can of course also be dried. The adhesive thus hardens and the pieces of fiber are fixed on the outer surface of the connector 2.

These process steps can be used to treat the connector be finished. However, the following process steps can also follow if, in the second process step, the engagement parts 4 and 6 of the plug and socket had not been coated.

In this fourth process step, the plugged-in connectors are separated from one another. Then at least one of the engagement steep 4 or 6 coated with adhesive. The adhesive can be the entire surface or just one Coat part of the surface of this part 4 or 6.

In a fifth process step, pulverized pieces of fiber, the length of which is equal to or shorter than the length of the fiber pieces used in the first process step, blown between the electrodes 14 in FIG. This fiber

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Bits separate on at least one of the two parts 4 and 6 and thereby fill the gap between socket and plug, which is due to a loose contact between socket and Connector is based. For this reason, the length of the fiber pieces is the same or preferably shorter than the length of the Pieces of fiber that were used in the first process step. This is sufficient to fill the disturbing gap.

In a sixth step, that connector part is which was coated with the adhesive in the fourth process step, moved through the cloud of fibers 12 '. It therefore, some bits of fiber adhere to the selected engagement steep 4 or 6.

In a seventh process step, this part is dried. This can be done so that the coated connector parts are input to the high-temperature chamber, where they are about dried for 10 minutes at a temperature of 80 to 10O ⁰ C. They can also be dried naturally.

The sound-insulated connectors produced in this way no longer generate a booming noise, which is caused by a loose engagement parts 4 and 6 of the plug and socket are resting.

The selectively coated fibers on the surface of the soundproofed Connectors act as a sound-absorbing cushion. This result is illustrated by the following experiments.

Comparative experiment I

A connector pair 2 was placed on a vibrating plate 18 made of steel (0.8 mm thick), which is in the middle of a Oscillating table 20 was located. See Fig. 6. A microphone 22 was at a distance of about 350 mm from the connector pair

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Ail

set up. A sound level meter 24 was connected to the microphone 22. Then the vibrating table 20 was vibrated offset. The frequency was set to 20 to 200 Hz, and that frequency range became during one minute driven through. The acceleration was 4.5 G. The test was carried out in accordance with the JIS 1601 standard for vibration tests on motor vehicle parts carried out.

Four experiments were carried out as follows:

(1) The vibrating table was made without a pair of connectors operated;

(2) A pair of conventional connectors were put on the plate 18, and then the vibrating table became put into operation;

(3) A connector pair coated with fibers with a length of 1.5 mm was applied to the panel as in experiment (2) attached and then the vibrating table 20 was vibrated;

(4) A pair of connectors coated with fibers with a length of 3 mm was attached to the plate 18 and then the vibrating table 20 was made to vibrate.

The sound level in dB for each of these four experiments is in in the following table:

attempt
No. 20th (D (2) (3) (4) Hz 100 77 82 77.5 77.5 200 100 104 102 100 85 96 86 85

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Figure 7 shows these results graphically. The curve A corresponds to the results of the experiment (1). Curve B corresponds to that of experiment (2); the curve C to the trial (3) and curve D to "Experiment (4).

It can be seen that connectors according to the invention are strong act sound-absorbing or sound-absorbing, specifically with regard to the noise caused by vibrations of the motor vehicle body is caused.

In addition, it follows that conventional connector a generate annoying roar beyond the frequency of 100 Hz, while connectors according to the invention according to the Attempts (3) and (4) do not make such a sound at all produce. Below oscillations of 100 Hz there was a rattling Noise can be heard during the experiment (2), but not during the experiments (3) and (4).

Comparative experiment II

A connector pair 2 (see. Fig. 8) made of nylon 66 was on the 2 mm thick oscillating plate 18 made of steel is placed. the Vibration test rig was Model VS-3202 from International Mechanical Vibration Laboratory, Inc. That Microphone 22 was at a distance of about 150 mm from the Connector set up. A frequency analyzer 26 (IYPE SA-57 made by Lyon Co., Ltd.) was attached to the microphone 22 connected. The vibrating plate-18 was with a frequency operated from 50 Hz. The acceleration was 4.5 G.

The one generated by the connector pair 2 and the vibrating plate 18 Noise when these parts met was over that Microphone 22 recorded. The sound levels at various frequencies obtained from the analyzer 26 were recorded. Figures 9 to 15 give these sound levels

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against, for a conventional pair of connectors (Curve A) compared with the following samples (each curve B)

Length of the fiber piece- thickness of the fiber pieces

(mm) (denier)

Fig. 9 3.0 30th ■ - - ■; . ₃ ; j If 10 1.5; • 14 1.5 M. 11 1.5 8th Il 12th 1.0 6th η 13th 1.0 3 Il 14th 0.3 II 15th 0.3

The diagrams show that the longer and thicker the pieces of fiber, the lower the sound level at every frequency are.

It was also found that the annoying rattling noise was not generated. This is also proven by the diagrams that show that the sound level with a connector with a fiber coating is noticeably lower than the sound level for a conventional connector, within the range between 250 and 8,000 Hz.

Connectors according to the invention thus effectively reduce the Sound resulting from vibrations of the vehicle body using connectors. In particular, be annoying booming noises and rattling noises are almost completely eliminated when plug-in connectors according to the invention are used will.

The patent attorney 809831/0722 OJLA Dr.

Claims (1)

■ - "" "-.'- patent or protection claims Connectors, d a d u r c h g e k e η η ζ e i c h η e t, that at least part of its surface is coated with fibers (12). ■ 2, ■ connector according to claim 1, d a d ü r c h g e k e η η ζ e i c h η e t, that the pasers (12) made of nylon, rayon or wool exist. 3 »Connector according to claim 1, dad u r c h g e k e η η ζ e i c h η e t, that the coated part of the surface includes that part of its surface that is in the mated state is accessible from the outside, the connector from There is a plug and socket. ^ h. Connector according to claim 1, ; da d u r c h g e k e η η ζ e i c h η e t, that the coated part of the surface has at least one : - "■" -, part of the touching part and part of the non-touching part of the connector includes in the unmated state, -wherein the connector consists of a plug and socket. 5. A method for producing a connector, in particular according to one of claims 1 to 4, characterized, that pulverized pieces of fiber between two to one Electrodes applied to a predetermined voltage are blown so that the fibers move one in each direction Form a freely moving cloud between the electrodes that plug connectors are moved by this cloud 809831/0722 ORIGINAL INSPECTED at least part of its freely accessible surface are provided with an adhesive, so that some of the fiber bits adhere to the adhesive on the relevant portion and there form a fiber coating _t whereupon the adhesive layer is dried to fix the coating on the surface. 6. The method according to claim 5,
characterized, • that if the connector is designed as a socket and plug, these two parts before being inserted into the Cloud to be plugged into each other to apply the adhesive. 7. The method according to claim 6,
characterized in that following drying, both connector parts are separated from each other in order to apply an adhesive to one of the engagement parts of at least one of the two connector parts, whereupon pulverized fiber pieces are blown between both electrodes, which are applied to a predetermined voltage, where the fibers one Form cloud between the electrodes, the length of the fiber pieces is not greater than the length of those fiber pieces that were previously connected to the connector, whereupon socket and plug are moved through the cloud consisting of fibers, so that some of the fiber pieces on the fresh adhesive layer adhere and form a coating there, whereupon the adhesive layer is dried in order to fix the coating to the part concerned. 8. The method according to claim 5,
characterized in that when the connector is designed as a socket and plug, these are treated in the unplugged state. 809831/0722 Method for producing a plug connector, in particular according to one of Claims 1 to 4, characterized in that pulverized pieces of fiber between two electrodes are blown to which a predetermined voltage is applied, so that the pieces of fiber form a "cloud" between the Form electrodes, whereupon a socket and a plug moved through the cloud in the plugged state at least some of the externally accessible surfaces of the socket and plug with an adhesive are coated so that some of the pieces of fiber on the adhesive layer of this part of the exposed Adhere to the surface and form a fiber coating there, whereupon the adhesive layer is dried to fix the coating to the surfaces, whereupon Socket and plug are separated from each other in order to apply an adhesive to at least part of the nested parts of the connector, whereupon pulverized pieces of fiber are blown between between two electrodes, across which a predetermined voltage is applied so that the pieces of fiber form a cloud between form the electrodes, the length of the fiber pieces -__..._ chen not being greater than the length of those fiber pieces, which were used before, whereupon the socket or plug is moved through the cloud, so that some the fiber pieces adhere to the adhesive layer on this connector part and form a coating there, whereupon the adhesive layer is finally dried to fix the coating to that part. The patent attorney Dr. D-. Gudel -Description 809831/0722